# CVE-2026-56684: Valkey: TLS pending-data processing use-after-free may allow remote code execution CVE-2026-56684 is fixed in 8 products on 1 platform, first by OPENSUSE-SU-2026:21485-1, released July 30, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-56684 - Priority: High - CVSS: 8.8 (Important) - EPSS: 0.0052 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jul 30, 2026 - Weakness: Use After Free - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56684 ## Description Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's tlsProcessPendingData function iterates pending_list while an authenticated client can trigger CLIENT KILL, causing connTLSClose to delete the iterator's cached next node and producing a use-after-free that can crash the server or potentially allow remote code execution when TLS is enabled. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | valkey Debian 13.5 (trixie) | 8.1.1+dfsg1-3+deb13u3 | [DEBIAN-CVE-2026-56684](https://patchblox.com/security/data/fix/linux/debian-cve-2026-56684.md) | Sep 1, 2026 | | Linux | valkey Debian 14 | 9.1.1-1 | [DEBIAN-CVE-2026-56684](https://patchblox.com/security/data/fix/linux/debian-cve-2026-56684.md) | Sep 1, 2026 | | Linux | valkey RHEL 10 | 8.0.11-1.el10_0 | [RHSA-2026:68601](https://patchblox.com/security/data/fix/linux/rhsa-2026-68601.md) | Sep 10, 2026 | | Linux | valkey RHEL 9 | 0:8.0.10-1.el9_8 | [RHSA-2026:64807](https://patchblox.com/security/data/fix/linux/rhsa-2026-64807.md) | Sep 13, 2026 | | Linux | valkey almalinux 10 | 8.0.11-1.el10_2 | [ALSA-2026:64796](https://patchblox.com/security/data/fix/linux/alsa-2026-64796.md) | Sep 8, 2026 | | Linux | valkey almalinux 9 | 8.0.10-1.el9_8 | [ALSA-2026:64807](https://patchblox.com/security/data/fix/linux/alsa-2026-64807.md) | Sep 8, 2026 | | Linux | valkey amzn 2023 | 9.0.5-1.amzn2023.0.1 | [ALAS2023-2026-2011](https://patchblox.com/security/data/fix/linux/alas2023-2026-2011.md) | Aug 3, 2026 | | Linux | valkey ol 10 | 0:8.0.11-1.el10_2 | [ELSA-2026-64796-0](https://patchblox.com/security/data/fix/linux/elsa-2026-64796-0.md) | Sep 8, 2026 | | Linux | valkey ol 9 | 0:8.0.10-1.el9_8 | [ELSA-2026-64807-0](https://patchblox.com/security/data/fix/linux/elsa-2026-64807-0.md) | Sep 8, 2026 | | Linux | valkey opensuse-leap 16.0 | 8.0.10-160000.1.1 | [OPENSUSE-SU-2026:21485-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21485-1.md) | Jul 30, 2026 | | Linux | valkey rocky 10 | 0:8.0.11-1.el10_2 | [RLSA-2026:64796](https://patchblox.com/security/data/fix/linux/rlsa-2026-64796.md) | Sep 9, 2026 | | Linux | valkey rocky 9 | 0:8.0.10-1.el9_8 | [RLSA-2026:64807](https://patchblox.com/security/data/fix/linux/rlsa-2026-64807.md) | Sep 9, 2026 | | Linux | valkey sles 15.6 | 8.0.10-150600.13.28.1 | [SUSE-SU-2026:3483-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3483-1.md) | Aug 4, 2026 | | Linux | valkey sles 15.7 | 8.0.10-150700.3.20.1 | [SUSE-SU-2026:3427-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3427-1.md) | Jul 30, 2026 | | Linux | valkey-debuginfo amzn 2023 | 9.0.5-1.amzn2023.0.1 | [ALAS2023-2026-2011](https://patchblox.com/security/data/fix/linux/alas2023-2026-2011.md) | Aug 3, 2026 | | Linux | valkey-debugsource amzn 2023 | 9.0.5-1.amzn2023.0.1 | [ALAS2023-2026-2011](https://patchblox.com/security/data/fix/linux/alas2023-2026-2011.md) | Aug 3, 2026 | | Linux | valkey-devel RHEL 9 | 0:8.0.10-1.el9_8 | [RHSA-2026:64807](https://patchblox.com/security/data/fix/linux/rhsa-2026-64807.md) | Sep 13, 2026 | | Linux | valkey-devel almalinux 10 | 8.0.11-1.el10_2 | [ALSA-2026:64796](https://patchblox.com/security/data/fix/linux/alsa-2026-64796.md) | Sep 8, 2026 | | Linux | valkey-devel almalinux 9 | 8.0.10-1.el9_8 | [ALSA-2026:64807](https://patchblox.com/security/data/fix/linux/alsa-2026-64807.md) | Sep 8, 2026 | | Linux | valkey-devel amzn 2023 | 9.0.5-1.amzn2023.0.1 | [ALAS2023-2026-2011](https://patchblox.com/security/data/fix/linux/alas2023-2026-2011.md) | Aug 3, 2026 | | Linux | valkey-devel ol 10 | 0:8.0.11-1.el10_2 | [ELSA-2026-64796-0](https://patchblox.com/security/data/fix/linux/elsa-2026-64796-0.md) | Sep 8, 2026 | | Linux | valkey-devel ol 9 | 0:8.0.10-1.el9_8 | [ELSA-2026-64807-0](https://patchblox.com/security/data/fix/linux/elsa-2026-64807-0.md) | Sep 8, 2026 | | Linux | valkey-redis-compat Ubuntu 24.04.5 LTS (noble) | 7.2.13+dfsg1-0ubuntu0.1+esm1 | [valkey-redis-compat 7.2.13+dfsg1-0ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-valkey-redis-compat-7.2.13-dfsg1-0ubuntu0.1-esm1.md) | Aug 18, 2026 | | Linux | valkey-sentinel Ubuntu 24.04.5 LTS (noble) | 7.2.13+dfsg1-0ubuntu0.1+esm1 | [valkey-sentinel 7.2.13+dfsg1-0ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-valkey-sentinel-7.2.13-dfsg1-0ubuntu0.1-esm1.md) | Aug 18, 2026 | | Linux | valkey-sentinel Ubuntu 26.04.1 LTS (resolute) | 9.0.4-0ubuntu0.2 | [valkey-sentinel 9.0.4-0ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-valkey-sentinel-9.0.4-0ubuntu0.2.md) | Sep 4, 2026 | | Linux | valkey-server Ubuntu 24.04.5 LTS (noble) | 7.2.13+dfsg1-0ubuntu0.1+esm1 | [valkey-server 7.2.13+dfsg1-0ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-valkey-server-7.2.13-dfsg1-0ubuntu0.1-esm1.md) | Aug 18, 2026 | | Linux | valkey-server Ubuntu 26.04.1 LTS (resolute) | 9.0.4-0ubuntu0.2 | [valkey-server 9.0.4-0ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-valkey-server-9.0.4-0ubuntu0.2.md) | Sep 4, 2026 | | Linux | valkey-tools Ubuntu 24.04.5 LTS (noble) | 7.2.13+dfsg1-0ubuntu0.1+esm1 | [valkey-tools 7.2.13+dfsg1-0ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-valkey-tools-7.2.13-dfsg1-0ubuntu0.1-esm1.md) | Aug 18, 2026 | | Linux | valkey-tools Ubuntu 26.04.1 LTS (resolute) | 9.0.4-0ubuntu0.2 | [valkey-tools 9.0.4-0ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-valkey-tools-9.0.4-0ubuntu0.2.md) | Sep 4, 2026 | --- Data as of 2026-11-09T13:31:49Z UTC. 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